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From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Quotation from Foster Engineering Co. Ltd. for two single-phase oil-cooled transformers.

Identifier  ExFiles\Box 32\4\  Scan013
Date  12th October 1920
  
X.1581

FOSTER ENGINEERING CO. LTD.
MordenWorks,
Wimbledon, S.W.19.

2634.
H.L.B.
R.L.B.

Messrs. Rolls-Royce Ltd.,
Nightingale Road,
DERBY.

X.1109

Q.6367.

12th October, 1920.

Wd{Mr Wood/Mr Whitehead}/Ms2/FJ8.10.20.

Quotation from The Foster Engineering Co. Ltd.
---------------------------------------------

Two Single phase oil cooled Transformers for

use on 200 volts 42 periods supply, secon-
dary 20,000 volts Output 1 K.V.A. price
without oil the sum of Thirty two pounds
each nett £32.0.0ea.nt.

Quantity of oil 10 gallons each nett

Price of oil 6/- per gallon nett.

We should recommend that this Transformer be
used with a potentiometer resistance on
the low tension circuit so that the high
pressure may be applied gradually and without
jumps.

Time for despatch not guaranteed, but would pro-
bably be about 12/14 weeks.

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